Make sure that button is clear of command in manager. Map any OUT command to that specific button and scroll trough list looking for highlighted commands. Once you find it go ahead and reset to see a result.
Clear all mappings from device menu and add new generic midi device.
Sorry for late reply. I didn’t receive update on this.
Don’t let that confuse you, that was just explanation how to achieve first step that you now got sorted out. Good going so far.
By list I refer to all the commands that are already added to the mapping. When you select any command by clicking it that command becomes “highlighted” in yellow as any other command that is already mapped to the same button assignment (note massage) in that mapping device. It’s easiest way for me to locate certain command when editing mappings.
Still waiting for “hot command” MIDI assignments in Traktor.